1 . 已知椭圆
的离心率为
,上顶点为M,下顶点为N,
,设点
在直线
上,过点T的直线
分别交椭圆C于点E和点F.
(2)求证:直线
恒过定点,并求出该定点;
(3)若
的面积为
的面积的k倍,则当t为何值时,k取得最大值?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d72a07a4e5acfc140a3cea1f26b951.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/040d6732d32d552cb60f1a9430b67c67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/110e74916a254817638edbc28b1a363a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/107babba45f110012183dc4dc54490f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37a887bfa3cac99e4bd33610515b722b.png)
(2)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6bf66a5f30d94390f59c6a3d1ae6c46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db687a72ac51db994067207e136c8857.png)
您最近一年使用:0次
2023-02-10更新
|
1821次组卷
|
5卷引用:浙江省杭州市2022-2023学年高三上学期第一次质量检测(期末)数学试题
名校
2 . 如图,在四棱锥
中,侧面
是边长为
的正三角形且与底面垂直,底面
是菱形,且
,
为棱
上的动点,且
.
![](https://img.xkw.com/dksih/QBM/2022/9/2/3057811122692096/3057845507432448/STEM/571fea07919a4b8789b6a773132ad9e7.png?resizew=189)
(1)求证:
为直角三角形;
(2)试确定
的值,使得平面
与平面
夹角的余弦值为
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fceddfa42f8cac1903c31d822cc1d66e.png)
![](https://img.xkw.com/dksih/QBM/2022/9/2/3057811122692096/3057845507432448/STEM/571fea07919a4b8789b6a773132ad9e7.png?resizew=189)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c025ee3317be1099b7bf03a11e37ed4.png)
(2)试确定
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ddb7c2ca1b6bee86cb24fed02e40da2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9868f77d5ab5073b6145f1c6d272122e.png)
您最近一年使用:0次
2022-09-02更新
|
2391次组卷
|
2卷引用:浙江省湖州市湖州中学2024届高三上学期第一次质量检测数学试题
名校
解题方法
3 . 已知点
,
在双曲线E:
上.
(1)求双曲线E的方程;
(2)直线l与双曲线E交于M,N两个不同的点(异于A,B),过M作x轴的垂线分别交直线AB,直线AN于点P,Q,当
时,证明:直线l过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448c0a5ee776d19ce8e42ac9a5fd27c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd7dc894ba817cacd7a4c3ae236c162f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3040b6c904477030ecf8ba20b2b18759.png)
(1)求双曲线E的方程;
(2)直线l与双曲线E交于M,N两个不同的点(异于A,B),过M作x轴的垂线分别交直线AB,直线AN于点P,Q,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63f15f831e2248bf4592beaff0f1b9d4.png)
您最近一年使用:0次
2022-11-10更新
|
2065次组卷
|
8卷引用:浙江省宁波市2023届高三上学期一模数学试题
浙江省宁波市2023届高三上学期一模数学试题浙江省杭州学军中学2022-2023学年高二上学期期末数学试题浙江省宁波市鄞州中学2023-2024学年高二上学期11月月考数学试题山东省实验中学2022-2023学年高三上学期12月月考数学试题吉林省长春市十一高中2022-2023学年高三下学期期初考试数学试题贵州省黔西南州兴义市第六中学2022-2023学年高二下学期第三次月考数学试题江西省乐平中学2022-2023学年高二下学期3月月考数学试题(已下线)专题10 圆锥曲线综合大题10种题型归类-【寒假分层作业】2024年高二数学寒假培优练(人教A版2019选择性必修第一册)
解题方法
4 . 如图,在四棱锥
中,底面
为梯形,
,
,
,
,平面
平面
,
为棱
上的点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/12/71397104-2aa1-4a2f-a060-c8b8f85af6fb.png?resizew=256)
(1)求证:
平面
;
(2)若
,二面角
为
,求平面
与平面
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1310d0cfa1dc445d8c0fd253e240e40c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4ab7e657f01bdfa235f8c4d6681d13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f552bb9416b8d6f66d20f9311b5da70.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/12/71397104-2aa1-4a2f-a060-c8b8f85af6fb.png?resizew=256)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c372d059202ec388960b125d4a87dc84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41cd5c4f8b106d01e0e431078e1a468b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d399d731913a563e291b817831a0c678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745e0525a41fe2e2a7739c75a942290b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
2023-04-09更新
|
1572次组卷
|
2卷引用:浙江省杭州地区(含周边重点中学)2023届高三一模数学试题
解题方法
5 . 已知双曲线
:
的离心率为
,并且经过点
.
(1)求双曲线
的方程.
(2)若直线
经过点
,与双曲线右支交于
、
两点
其中
点在第一象限
,点
关于原点的对称点为
,点
关于
轴的对称点为
,且直线
与
交于点
,直线
与
交于点
,证明:双曲线在点
处的切线平分线段
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ec7fa23be9cbe9a50607ea6bc8a4ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a950a998c992f4cdf141bd6893261fa5.png)
(1)求双曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fab8a0cc6504aa4c3a38006f5394b4c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
您最近一年使用:0次
2023-04-09更新
|
1076次组卷
|
2卷引用:浙江省杭州地区(含周边重点中学)2023届高三一模数学试题
名校
6 . 已知四面体ABCD,D在面ABC上的射影为
,
为
的外心,
,
.
(1)证明:BC⊥AD;
(2)若E为AD中点,OD=2,求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79faaf0e895a5e3edf40756d990e1161.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/29/5a52cbb1-69b4-4e70-b773-e3b963b6bae7.png?resizew=136)
(1)证明:BC⊥AD;
(2)若E为AD中点,OD=2,求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1ef8395c1f528613bcf683cfe9dc1a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dac901ff434c379e158fccd64dc6401f.png)
您最近一年使用:0次
2023-05-26更新
|
896次组卷
|
3卷引用:浙江省杭州第二中学等四校2023届高三下学期5月高考模拟数学试题
7 . 如图,在四棱锥
中,已知
,
,
,
,
,
,
为
中点,
为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/9/e19792f1-39e4-4b38-be6d-34a1504853c3.png?resizew=196)
(1)证明:平面
平面
;
(2)若
,求平面
与平面
所成夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21b69c41147a67cb486426ee88bd41ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22661c00094a4625b2e68b4e4ea676ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b60f7441172407b19e9e61b85a0170d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d82e3d915a1eef13aad9147610c7db2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6610676353016a9f7235d306b731c1e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42789f54f6d3e1d508837711c6a873b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/9/e19792f1-39e4-4b38-be6d-34a1504853c3.png?resizew=196)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b9658dd92f4bc8ec3d68534e48e16a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b6aeaf411b82c8a3b2770ac1262cc62.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd3eb538f36e6e722e4ce125266b99b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30f457418e6a7e21f0ed0bf490a3709c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
您最近一年使用:0次
2023-02-04更新
|
3946次组卷
|
5卷引用:浙江省Z20名校联盟(浙江省名校新高考研究联盟)2023届高三第二次联考数学试题
浙江省Z20名校联盟(浙江省名校新高考研究联盟)2023届高三第二次联考数学试题湖南师范大学附属中学2023届高三下学期月考(七)数学试题(已下线)专题2 求二面角的夹角(1)广东省佛山市第一中学2023届高三4月一模数学试题(已下线)立体几何专题:空间二面角的5种求法
8 . 如图,在四棱锥P-ABCD中,底面ABCD为正方形,底面ABCD,
,E为线段PB的中点,F为线段BC上的动点.
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6501f1c913a4ef64957a2f01ab5baa15.png)
(2)若直线AF与平面PAB所成的角的余弦值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9868f77d5ab5073b6145f1c6d272122e.png)
您最近一年使用:0次
2023-02-03更新
|
4079次组卷
|
14卷引用:浙江省绍兴市第一中学2023届高三下学期4月限时训练数学试题
浙江省绍兴市第一中学2023届高三下学期4月限时训练数学试题广东省惠州市2023届高三第三次调研数学试题湖南省岳阳县第一中学2022-2023学年高三下学期第一次月考数学试题(已下线)模块十一 立体几何-1(已下线)大题强化训练(6)(已下线)专题1 利用空间向量求距离(1)江苏省常州市前黄高级中学2023届高三下学期二模适应性考试数学试题福建省厦门市双十中学2022-2023学年高二下学期期中数学试题安徽省安庆市岳西中学2023-2024学年高二上学期10月月考数学试题(已下线)模块三 专题4 大题分类练(立体几何)基础夯实练(已下线)每日一题 第19题 空间距离 要用向量(高三)江苏省苏州大学2024届高考新题型2月指导卷数学试题(已下线)专题06 立体几何 第二讲 立体几何中的计算问题(解密讲义)(已下线)专题06 立体几何 第一讲 立体几何中的证明问题(解密讲义)
解题方法
9 . 设抛物线
,过
轴上点
的直线
与
相切于点
,且当
的斜率为
时,
.
(1)求
的方程;
(2)过
且垂直于
的直线交
于
两点,若
为线段
的中点,证明:直线
过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da160ad8a0cddbbce70e760a1a96ff30.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d7b816eca15d4b7d060013df53edd53.png)
您最近一年使用:0次
名校
10 . 如图,正三棱柱
的所有棱长均为
为
的中点,
为
上一点,
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/8/41ebce30-ac87-4696-bd1e-8d344c156e13.png?resizew=155)
(1)若
,证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
平面
;
(2)当直线
与平面
所成角的正弦值为
,求
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8941cbef5ca62d0a3d7bb4ade509dfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/8/41ebce30-ac87-4696-bd1e-8d344c156e13.png?resizew=155)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0761165f1176f3a5fe4f7b052832316d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69bcb3226e013650b7d8827c31dd41d0.png)
(2)当直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1918cb669121bfe6ab3bf2431553aff8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2f75c42c77264076166fff76cfab4ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
您最近一年使用:0次
2023-05-08更新
|
794次组卷
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3卷引用:浙江省绍兴市诸暨市2023届高三下学期5月适应性考试数学试题